AR 5.56 Ammunition

[650bail]

Weapons world has that special going for Federal NATO 55g 5.56 ammo.

I have a BCM upper with a 5.56 chamber but I have 1/7 twist barrel. I've been told that I should be shooting 62 grain and up ammo with this upper. Is that correct? Thanks

[XDRoX]

I have he same barrel and shoot 55gr in mine all the time. They shoot fine.

[grant22]

Or buy a small box locally and try before you buy.

[drifter001]

i have the same upper and shoot 55 grain perfectly fine with no problems. the lower twist just gives us the opportunity to shoot the heavier rounds more accurately too

[grant22]

What kind of groups are you guys getting with 55 gr in a 1-7?

[fabguy]

depends, 1 in 8" twist although they are light loads.

[grant22]

That's what I was thinking. In my 1-8, 55gr goes bang and maybe accomplish a 2.5" group. Not good enough for what I'm looking to do.

So I'm wondering what the OP's standards are? Does he want moa, sub moa, plinking rds???

[650bail]

No this is my "deep larder" pack it away ammo. I loved the way the PFS 62g .223 performed in my carbine at the last class I took I was just curious.

[damndave]

55gr will shoot perfectly fine.

[EL_NinO619]

I have a bunch of Herters 62 grain if you wanna buy... $4 a box of 20

[fabguy]

That's what I was thinking. In my 1-8, 55gr goes bang and maybe accomplish a 2.5" group. Not good enough for what I'm looking to do.

So I'm wondering what the OP's standards are? Does he want moa, sub moa, plinking rds???

About the same here, I load light so my kids can plink away. I load 69 gr and 75 gr mainly for myself. Either work great in my 24" w/ 1 in 8"(both) or my 16" w/ 1 in 9"(69 gr.).

[ireload]

You will be fine shooting 55 grainers in a 1/7 rifling. I would consider around 2" at 100 yards decent for a 55 grainer coming out of a 1/7 rifling. That's good enough for informal paper punching or plinking.